Optical waveguide spool



FIG. 1 is a top perspective view of an optical waveguide spool showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is a top perspective view thereof.

The broken line showing the optical waveguide spool in FIGS. 1, 2 and 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an optical waveguide spool, as shown and described. 